404478818 has 8 divisors (see below), whose sum is σ = 608047212. Its totient is φ = 201796416.

The previous prime is 404478797. The next prime is 404478847. The reversal of 404478818 is 818874404.

It can be written as a sum of positive squares in 2 ways, for example, as 401321089 + 3157729 = 20033^2 + 1777^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×404478818² = 327206228421354248, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220355 + ... + 222182.

Almost surely, 2^404478818 is an apocalyptic number.

404478818 is a deficient number, since it is larger than the sum of its proper divisors (203568394).

404478818 is a wasteful number, since it uses less digits than its factorization.

404478818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442996.

The product of its (nonzero) digits is 229376, while the sum is 44.

The square root of 404478818 is about 20111.6587580438. The cubic root of 404478818 is about 739.5461168441.

The spelling of 404478818 in words is "four hundred four million, four hundred seventy-eight thousand, eight hundred eighteen".